"A new art has been with us for nearly a decade now, as it emerged from the void that followed the diminishing presence of abstract expressionism. One would hope that happenings, pop art, minimal sculpture, and the like are, like the computer and thermonuclear capability, sufficiently established in our common sensibility by now so that we can accept them as subjects worthy of intelligent discussion....Assemblage, Environments & Happenings (1966) and Store Days (1967) are the first full-sized books by two of the new art’s most eminent and articulate practitioners. As their respective authors, Allan Kaprow and Claes Oldenberg are both adventurous artists, who have created theatrical pieces and prose essays as well as objects to be displayed, so the books they produce are distinctly unlike any tomes we know, and yet as coherent and authentic as everything else they have done."--Richard Kostelanetz, Print-Out on the New Art (1968)